Cementing machine



Nov. 2, 1937. K H I 2,098,101

CE KMENTING MACHINE Filed Aug. 21, 1956 Patented Nov. 2, 1937 UNITEDSTATES PATENT OFFICE CEMENTING MACHINE Irving L. Keith, Haverhill, Mass.

Application August 21, 1936, Serial No. 97,128

1 Claim.

This invention relates to cementing machines of the horizontallydisposed, vertically movable grid type, in which the grid is completelysubmerged in the liquid cement and then raised above the liquid level,so that the work to which the cement is to be applied may be laid on thetop of the grid and the cement thereon may be transformed thereto.

The raising and lowering of the grid is performed either by a foottreadle, operated by the operator, or automatically by an electricmotor, which operates cams so arranged that the grid is momentarily heldpractically stationary at the top of its movement and is quickly loweredand raised again during the rest of the revolution of the cams. As aresult, a somewhat violent churning action takes place within the pancontaining the adhesive, and, when the adhesive employed is rubberlatex, this action causes the latex to foam, so that it often overflowsfrom the pan containing it. Other objectionable results are also caused,such as covering portions of the work with the adhesive to which itshould not be applied, and causing coagulation of the latex so that itbecomes worthless as an adhesive. The same objectionable results alsooccur in connection with the treadle operated machines, although in asomewhat less degree, as the speed at which the grid is operated isusually less.

The use of latex in connection with the manufacture of shoes is,however, considered very desirable, on account of its low cost, ascompared with many other adhesives, and the type of machine abovereferred to has been found to be the most practical for many of thecement applying operations necessary in connection with the manufactureof shoes.

The object of my invention is to provide a cementing machine of theabove described type in which rubber latex may be employed, and withwhich foaming and other objectionable results due to the churning actionof the grid, will be eliminated.

I accomplish this object by increasing the depth of the grid bars andrelatively arranging the limits of movement of the grid so that thelower edge portions of the bars are not raised above the surface of theliquid at any time. Also by providing means for maintaining the liquidat a constant level, so that the limits of movement of the grid withrelation to the liquid level may be constantly maintained and completesubmergence of the grid when lowered will be assured at all times.

For a more complete disclosure of my invention reference is now made tothe following specification, in connection with the accompanying drawingin which:

Fig. 1 is a top plan view of a cementing machine embodying my invention.Fig. 2 is a sectional view at line 2-2 of Fig. 1.

Fig. 3 is an end view.

Figs. 4 and 5 are detail views illustrating the limits of movement ofthe grid with relation to the liquid level.

In the drawing, a supporting bench or table I0 is indicated, on the topside of which a liquid adhesive containing receptacle I2 is supportedand to the underside of which a base I4 is attached. A horizontal shaftI6 is journaled in bearings supported by said base and is adapted to becontinuously driven by a motor I8 through a worm shaft and a worm gear22 on shaft l6. A cam 24 is mounted on shaft l6 ateach end thereof, anda pair of rods 26 are mounted 20 to reciprocate vertically in guidewaysat each end of the base l4, said rods having rolls 28 at their lowerends which rest on the cams 24, so that, when shaft I6 is rotated saidrods, will be reciprocated.

A grid 30 is supported by arms 32 on the top ends of rods 26, and may beof the type shown in my Patent #2,046,327 of July 7, 1936, beingcomposed of a series of flat, parallel bars of uniform width andsuitably spaced apart, the top edges 30 of said bars providing adhesivecarrying faces which are arranged in the same horizontal plane, so thatthe bottom edges of said bars are at a uniform level.

Means are preferably provided for maintaine 35 ing the liquid in thereceptacle at a constant level. The means shown consist in providing thereceptacle with an auxiliary reservoir l3 which opens directly into thereceptacle and to which the liquid is fed by an inverted bottle 32,which is supported by an adjustable bracket 34, on an upright 36 mountedon the support It). The bottle is so arranged that the end of its neckis at the level of the' liquid which is to be maintained, so that as theliquid is lowered in the receptacle additional liquid will be suppliedfrom the bottle in a manner which will be obvious. As thus arranged theliquid supplying means will not interfere with the work of the operator.

With the above described construction, when the shaft I6 is driven, thecams 24 thereon will act to lift the grid so that the top edges of thebars thereof will be at approximately the level of the top edges of thereceptacle, in which position said top edges will in practice be aboutA; of 5 an inch above the liquid level. In this position the lower edgesof the bars will still be submerged in the liquid, as indicated in Figs.2 and 4. The cams are preferably provided with a circular portion at theportion of greatest radius, so that there will be a slight dwell in themovement of the grid at the highest point to which it is lifted. As thecams are rotated from this position the grid is lowered by gravity to aposition in which the top edges of the grid bars are at a substantialdistance below the liquid level, as indicated in Fig. 5, so that theywill be completely submerged in the liquid and will carry,

up a fresh supply when raised again.

As thus arranged, the grid is never completely.

ated means for raising and lowering the grid are employed, the partswill be so arranged that the limits of motion of the grid will besubstantially the same as that above described.

I claim:

In combination with a liquid adhesive containing receptacle, ahorizontally disposed grid composed of suitably spaced bars ofsubstantial width vertically and having faces on their top edges adaptedto carry adhesive, and means for raising and lowering said grid withinsaid receptacle and for so limiting the vertical movements thereof withrelation to the liquid level in the receptacle that the grid is movedbetween a position in which it is completely submerged, so that adhesiveis applied to said faces, and a position in which the lower edges of thebars are still submerged and the upper edges thereof are raised abovethe liquid level, to permit the work to be laid thereon and adhesive onsaid faces to be 20

